Just roughly 3 percent of America's historic landmarks document the history of women, African-Americans and Native Americans. But an effort is underway as part of the Obama administration to broaden that historical reach, and include more locations important to Americans from diverse backgrounds.

Just roughly 3 percent of America's historic landmarks document the history of women, African-Americans and Native Americans. But an effort is underway as part of the Obama administration to broaden that historical reach, and include more locations important to Americans from diverse backgrounds.